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Bill & Brendas RV-8 QB
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Date:  12-24-2011
Number of Hours:  1.50
Manual Reference:  
Brief Description:  Canopy center slide block fitted and drilled-1

1. The slider block is a nylon piece that fits on the center T shape slide rail and connects to the back of the canopy frame. The holes for the slide block need to be drilled such that the lock pin will not drag along the rail. The plans call for 1/16 to 3/32 tolerance here.
I used the aileron jig sinc it is 1/16 thick and laid it on the center rail, resting the canopy pin on it for the required clearence. I slid the nylon block in to position and marked the canopy frame for its position. I then removed the frame and measured the distance from the line i drew to the hole center. I transfered that to the nylon block and drilled a 1/16 hole on the drill press. Reinstalled the frame and block and stuck the drill bit in to see if it was centered. It was, so then removed and drilled up to #12. The frame need to be final drilled as well to 3/16. Reinstalled everything and it looked good.

The trouble hit!

2. I removed the slider block so that I could counter bore one end for the clevis pin to ecess into.
I tried countersinking with a #12 counter sink but that was not big enough, So I grabbed a drill bit that was the right diameter and you guessed it...... it grabed that block and cork screwed itself most of the way through before I could stop it. Argg and double arghh!!
Well now I get to reorder this part but at least I know I can just transfer the measurements and drill and be back in business.
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Slide block in position and line marks its posiition on the frame

Slide block in position and line marks its posiition on the frame

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Aileron jig under the pin for a 1/16 gap. Clevis pin in place befor counter sink

Aileron jig under the pin for a 1/16 gap. Clevis pin in place befor counter sink

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View of the canopy frame fitment

View of the canopy frame fitment

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